Regulus still knows very little about technology, so his best guess as to what would count as 'equipment' falls under 'unrecognizable things with too many buttons.'

Mikoto is better about that, at least, even if the exact technology is unfamiliar to her in most cases. But both tense at Telrim drawing her weapon, just in case - it seems the Yeerk isn't the only one on guard in case of a doublecross.